P87CL52X2 datasheet(2/47 Pages) PHILIPS

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Philips Semiconductors

Product data

P87CL52X2/54X2

80C51 8-bit microcontroller family

8K/16K OTP 256 bytes RAM ROMless low voltage

(1.8 V to 3.3 V), low power, high speed (33 MHz)

2003 May 14

853-2427 29875

DESCRIPTION

The Philips P87CL5xX2 is a high-performance static 80C51 design

fabricated with Philips high-density CMOS technology with operation

from 1.8 V to 3.3 V.

The P87CL5xX2 ROMless devices contain a 256

× 8 RAM, 32 I/O

lines, three 16-bit counter/timers, a six-source, four-priority level

nested interrupt structure, a serial I/O port for either multi-processor

communications, I/O expansion or full duplex UART, and on-chip

oscillator and clock circuits.

In addition, the device is a low power static design which offers a

wide range of operating frequencies down to zero. Two software

selectable modes of power reduction — idle mode and power-down

mode — are available. The idle mode freezes the CPU while

allowing the RAM, time rs, serial port, and interrupt system to

continue functioning. The power-down mode saves the RAM

contents but freezes the oscillator, causing all other chip functions to

be inoperative. Since the design is static, the clock can be stopped

without loss of user data and then the execution resumed from the

point the clock was stopped.

FEATURES

• 8051 Central Processing Unit

– TSSOP or LQFP packages

– 256

× 8 RAM

– Three 16-bit counter/timers

– Boolean processor

– Full static operation

– Low voltage (1.8 V to 3.3 V@ 12 MHz) operation (12-clock

mode)

• Memory addressing capability

– 64k ROM and 64k RAM

• Power control modes:

– Clock can be stopped and resumed

– Idle mode

– Power-down mode

• CMOS and TTL compatible

• Two speed ranges at V

CC = 3.3 V

– 0 to 16 MHz (6-clock mode)

– 0 to 33 MHz (12-clock mode)

• Dual Data Pointers

• Four priority interrupt levels

• Six interrupt sources

• Four 8-bit I/O ports

• Full–duplex enhanced UART

– Framing error detection

– Automatic address recognition

• Programmable clock out

• Asynchronous port reset

• Low EMI (inhibit ALE)

• Wake-up from Power Down by an external interrupt

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